static void apply( const Input& in, std::string& s )
{
assert( !in.empty() ); // First character MUST be present, usually 'u' or 'U'.
if( !utf8_append_utf32( s, unhex_string< unsigned >( in.begin() + 1, in.end() ) ) ) {
throw parse_error( "invalid escaped unicode code point", in );
}
}
static void apply( const Input& in, State& st )
{
assert( ( ( in.size() + 1 ) % 6 ) == 0 ); // Expects multiple "\\u1234", starting with the first "u".
for( const char* b = in.begin() + 1; b < in.end(); b += 6 ) {
const auto c = unhex_string< unsigned >( b, b + 4 );
if( ( 0xd800 <= c ) && ( c <= 0xdbff ) && ( b + 6 < in.end() ) ) {
const auto d = unhex_string< unsigned >( b + 6, b + 10 );
if( ( 0xdc00 <= d ) && ( d <= 0xdfff ) ) {
b += 6;
utf8_append_utf32( st.unescaped, ( ( ( c & 0x03ff ) << 10 ) | ( d & 0x03ff ) ) + 0x10000 );
continue;
}
}
utf8_append_utf32( st.unescaped, c );
}
}
static void apply( const Input& in, std::string& s )
{
assert( ( ( in.size() + 1 ) % 6 ) == 0 ); // Expects multiple "\\u1234", starting with the first "u".
for( const char* b = in.begin() + 1; b < in.end(); b += 6 ) {
const auto c = unhex_string< unsigned >( b, b + 4 );
if( ( 0xd800 <= c ) && ( c <= 0xdbff ) && ( b + 6 < in.end() ) ) {
const auto d = unhex_string< unsigned >( b + 6, b + 10 );
if( ( 0xdc00 <= d ) && ( d <= 0xdfff ) ) {
b += 6;
(void)utf8_append_utf32( s, ( ( ( c & 0x03ff ) << 10 ) | ( d & 0x03ff ) ) + 0x10000 );
continue;
}
}
if( !utf8_append_utf32( s, c ) ) {
throw parse_error( "invalid escaped unicode code point", in );
}
}
}
